Transformer structure.



0. LE G. FORTESGUE. TRAHSFORMER STRUCTURE. v APPLIUATION FILED mm a, 1907. I 914,941 Patented Mar.9, 1909.

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WlT NESSES: 5 19 5 INVENTOR BY -mg.m ATTORNEY- mawwq 0. LE G. 'FORTESGUE. TRANSFORMER STBUGTUBE. APPLIOAITIOK FILED JUNE 8, 1907',

Pit ented Mar. 9, 1909.

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lo F. N R 0 1 T T A P a substantially bodies my invention,

' trans s ctlve view, of a portion o the transformer of Fi e0 nated magnetizable 4o iron bars 9 dmal reentrant between the angle iron legs for the pu 3, so as to being angle iron bars 14.

CHARLES LE G. FORTESGUE, OF WILKINSBURG,

PENNSYLVANIA, ASSIGNOR TO WESTlNG- HOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF' PENNSYLVANIA.

raxnsromma s'rnuo'rrmn.

Specification o1 Letters Patent.

Patented March a, 1909.

Application filed June 8, 1907. Serial No. 378,012.

To allpvhom it concern: Be it known that I, CHARLES .LE G. FOR- TESCUE, a subject of the King of Great Britain, and a resident of Wilkmsburg, in the 5 county of Allegheny and State of Pennsylvania, have invented anew and useful Improvement in Transformer Structures, of

which the following is a specification.

My invention relates to electrical trans- 10' iormers, and it has for its object to provide simple, practical and exceptionally effective means for securing together the parts of the core structure of a transformer and for suprtingnand-ma' taining the coils thereof in invariable relation with respect toeach otherand to the core.

Figure 1, of the accompanying drawin s, is aview, partially in elevation and partia y in vertical section, of a transformer that ema the casing being shown ifiiaetionfor the sake of cleamess of illustration. Fig. 2 is a view, partially in plan and partially in transverse' section, of the ormer shown in Fig. 1. Fig. 3 is a perof one ofthe parts 1 and Fig. 4 is a vertical sectional view 0 a transformer of a modified-term.

The transformer is provided with a lamicore com rising two vertical and substantially paral el legs or members 1 and 2 of cruciform cross section and cross members 3 and 4' that connect their respective ends. At the ends of the legs are 35 brackets 5, each of which, is here shown as comprising three arms 6, 7, and 8' disposed at angles of substantially 120 from each other. The brackets at the opposite ends of each leg are connected by means of angle that are located in the longituangular recesses in the legs together the laminae of the legs of the core, reeing interpose 9 and the core the smaller and serve to clamp the main portion of verselyfibent'anglmpifiQQsJQ b f lliars r ose o 0 am in l oi the legs '3) ti tions. Thesides of the angle iron bars 9 are cut away at their ends, as indicated in Fig. form zflat' strips that project through the end members of the core between the laminae. The respective brackets 5 at the to and the bottom of the core, are connected y meansioftransversely extend- Thus it is seen that side portions 1 e main POlthe core laminae of the transformer are rigidly secured .together and supported by the frame comprising the end brackets 5, the vertical angle iron bars 9, and the cross an le. iron bars 14, eye bolts 15 screwed into t 1e top brackets 5 being provided for the pur pose of lifting the transformer.

Immediately surrounding the respective core legs 1 and 2 and supported concentrically but out of engagement therewith by means of spacing blocks 16, are coils 17 and 18 that constitute the low voltage winding of the transformer, coils and the core legs serving as ducts through which oil or other medium, in which the transformer is immersed, may circulate in order to effect coolin thereof. Mounted concentrica y with the core but out of engagement therewith, as well as all other conducting parts of the transformer, are c linders 19 of insulating material of high ielectric strength, and outside of the c linders 19, and mounted concentrically tlierewith and with the core legs, are a lurality f coils 20 constituting the high vo tage winding of a transformer.

The cylinders 19 and the coils 20 are supported in position by means of blocks 21 that are secured to bars 22, the ends'oi' which are bolted to the arms of the brackets 5 at the top and bottom of the core, the coils 20 being sp ced apart and maintained concentric .with each other by means of spacing blocks that are bound thereto at convenient intervals. The bars 22 support and maintain the coils 20 concentric with the insulating cylinders 19, but out of engagement therewith, means for efieqtin adjustment of their positions being provi ed by means of thin spacing plates 24,; agreater or smaller number of which may be interposed between the ends oi'the arms of the brackets 5 and the bars 22. The pressure applied to the blocks 21 between which the cylinders 19 and the coils 20 are clamped may be adjusted b means of bolts 27 that are screw' threadec through the arms of the brackets 5.

Although the coils and the insulating cylin ders are preferably supported in concentrlc relation to each other and to the core legs, they may also be arrangedeccentricallyi as may be desired in some cases in order to 1ncrease the insulation distance between the inner sides of the two sets of coils which are nearest the top andbottom cross members the spaces between the legs,

. usually employed, and which provide surspaces, the supporting faces with comparatively short paths over whichhigh voltage charges may creep between the windings or between the high voltage winding and the core.

The present arrangement renders the insulation particularly effective between the high voltage winding and the top and bottom cross members of the core, and also between the portions of the windings that are located Within the rectangle formed by the core, because these parts are'separated only by means being applied outside of therectang e of the core, atsuch points as to afford only long surface distances over which charges may creep.

I claim as my invention:

1. In a transformer, the combination with a magnetizable core comprising a plurality of substantially parallel legs, and cross members joining the same, of brackets at the ends of the respective core legs, and means for clampingeach core le between and substantially concentric wit the brackets at the ends thereof. Q

Ina transformer, the combination with a magnetizable core comprising a plurality of substantially parallel legs, and cross members joining the same, of brackets at the ends of the core legs, means for connecting the brackets at the respective ends of the core means for clamping the core legs between and substantiall concentric with the brackets at the ends thereof, coils surrounding the legs, and means substantially invariable relations with respect to the said. legs. I

.3. In a transformer, the combination with a magnetizable core comprising a plurality of substantially parallel legs and cross members joining the same, of a bracket at each end 'of the core legs, means for connecting the brackets at the respective ends of the core, means for clam ing the core legs between and substantial ly concentric with the brackets at the ends"thereof, coils surroundingthe core legs, and means secured to the brackets and supporting and maintaining the coils in substantially invariable relations with respect to the core legs.

4. In a transformer, the combination with a magnetizable core comprising a plurality of substantially parallel legs, and core members joining the legs at their ends, of brackets for maintaining the coilsinat the ends of the corele' s, means for corn necting the brackets at the respective ends of the core, andnieansifor clamping the core legs between and substantially concentric with the brackets at the ends thereof.

. 5. In a transformer, the combination with a laminated magnetizable core comprising a lurality of substantially parallel cruciform iiags, and cross members joining the same at their ends, of brackets at the ends of thecore legs, and means. located in the reentrant angles of the core legs for connecting the brackets at opposite ends thereof.

6. Ina transformer, the combination with a laminated magnetizable core comprising a plurality, Oflsubstantially parallel cruciform legs, and cross members joining the same at their ends, of brackets at the ends of the core legs, means for connecting the brackets at the respective ends of the core, and means for clamping the core legs between and substantially concentrically with the brackets at the ends thereof, said means being located in the rentrant angles of the core legs.

7. In a' transformer, the combination with a laminated core comprising a plurality of substantially parallel cruciform legs and cross members joining the same at their ends, of-brackets at the ends of the core legs, means located in the reentrant angles of the core legs for connecting. the brackets at opposite ends thereof, coils surrounding the core legs, bars secured to the outer extremities of the brackets and rovided with means for supporting the sai coils in substantially invariable relations with respect to the core legs. g

8. In a transformer, the combination with a laminated core comprising a plurality of substantially parallel cruciform legs, and

cross members joining the same at their ends, of brackets at the ends of the core legs, means located in the rentrant angles of the core legs for connecting the brackets at opposite ends thereof, two sets of coilssur- I rounding the core legs, an insulatin cylinder between the two sets of coils, an means secured to the outer ends of the brackets and insu ating cylinder and the outer set of coils out of engagement with each other and the inner set of coils.

9. In a transformer, the combination with a magnetizable core comprising a plurality of legs, and cross members joining the same 'at their ends, of primary and secondary coils, insulating barriers between the said coils having notches in their ends for the cross members of the core, and means for sup orting the barriers out of engagement wi the said coils,

10. In a transformer, the combination with primary and secondary coils, of an insulating' barrier between the coils, and means rovided with means for supportingthe,

g0 another.

primary and secondary coils disposed one within the other upon each core leg, of means attached to the core for supporting the said coils substantially concentric with 'the core legs and with each other.

12. Ina transformer, the combination with a' magnetizable core comprising a plurality of substantially parallel legs-primary and secondary coils disposed one within-the 15 other upon each core leg, and insulating bar rlers between the primary and secondary coils, of means attached to thecore for supporting saidcoils, and barriers substantially concentric with the core legs and with one a transformer, the combination" with a magnetlzable core comprising one or more legs, and coils disposed one within the other upon each core leg, of means for securg the core parts together and for supportg the core legs and with each other.

14. In a transformer, ,the combination with a magnetizable core comprising one or more. legs, coils d sposed one within 7 the .otherupon each core leg, and insulating.

barriers between the coils, of means for securing the core "parts together andjor supporting said coils and barriers substantially concentric with the core legs and with one another. 3 r

' the coils substantially concentric with In testimony whereof, I have hereunto CHARLES LE G; FORTESCUE.

Witnesses: A I

O rro S. ScHAnmR,

BIRNEY Hmns.

subscribed my name this 31st day of May, 7 

